Mathematics, 23.10.2020 17:20 AmbitiousAndProud

In triangle ABC, the length of side AB is 12 cm, the length of side BC is 5 cm, and the length of side CA is 9 cm. Find the measure of angle A using the law of cosines.

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In triangle ABC, the length of side AB is 12 cm, the length of side BC is 5 cm, and the length of si...